| 摘要 |
<p>Disclosed is a digital computer system comprising an input data circuit, a processor for executing a program stored in a memory to process the inputted data, a depletable energy source for energizing the elements of the computer system, and a power control circuit for selectively controlling the drain imposed upon the energy source in accordance with the data input into the system and the program executed by the processor. The power control circuit is operative in at least three modes of operation, namely off/rest, power down, and operating. In the off/rest mode, the power control circuit energizes a storage element illustratively taking the form of a flip/flop to be receptive to an initialization signal as derived from an on/off switch to dispose the power control system from its off/rest mode to its power down mode. The storage element is energized throughout the entire operation of the system including the off/rest mode, wherein the remaining elements of the computer system are deenergized. In the power down mode, the control circuit applies power to the data input means. The data input means may include a keyboard and a decoder for providing a signal indicative that one of the keys has been depressed. Upon actuation of the key, a data available signal DA is transmitted to the power control circuit, whereby the computer system is disposed in its operating mode, wherein all of the elements of the computer system are energized. In its operating mode, the processor and its memory are fully energized to execute the stored program.</p> |
